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486 cooling

post #1 of 11
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what kind of cooling goes on a 486? i don't see any trace heat sink compound or a spot for the sink to latch on to. should i use a pentium 1 heat sink that sticks to the cpu or did they not have heat sinks on older ones
    
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post #2 of 11
I doubt they had hs's on the older ones...
 
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post #3 of 11
Double sided thermal tape
    
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post #4 of 11
They do not need heatsinks Lol

They dont get hot enough, I might dust off the old 386DX today, got some prince of persia and transport tycoon to take care of
    
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post #5 of 11
Hmm, thats strange cause my old one had a small 40mm gold heatsink and fan...
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post #6 of 11
now that brings back distant memories of my first PC encounters
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post #7 of 11
My 486 DX4-100 did not have a heatsink on it.
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post #8 of 11
Outside of the rare passive CPU heat sink, the only cooling in the old AT cases were the single 80mm PSU exhaust fans. Heat wasn't really an issue because viable overclocks weren't even an option without major chip/socket replacement = days of desoldering.
  
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post #9 of 11
my 386sx (16mhz) has no cooling on it... still runs wolfenstein3d like a charm (thats the only reason im keepin it)
 
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post #10 of 11
Quote:
Originally Posted by mashersmasher
what kind of cooling goes on a 486? i don't see any trace heat sink compound or a spot for the sink to latch on to. should i use a pentium 1 heat sink that sticks to the cpu or did they not have heat sinks on older ones
For 486's, you don't need a HS up to about 40-50 MHz. 50 and beyond should have one. 486's mostly used a passive HS, although some, especially 100-133 MHz, used a small active HS. If yours is a 3.3v part, (most of the slower ones are 5v) up to maybe 75MHz is safe.

Most 486 HS have some sort of clip that grabs the edges of the cpu, since sockets 1-3 do not have tabs on them. Some just use metalized double sided tape. I used to pick up discarded PCs all the time, and have seen a few 486-66's with nothing. Careful, though, even a 33MHz 486 with nothing gets extremely hot.

btw, i've found that most 5v 486's will run perfectly stable and much cooler on 3.3v.
    
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